Pandora's matching doesn't have a very good hit rate recommending music to me. But it's okay for automatically generating a radio station, so that I don't have

Pandora's matching doesn't have a very good hit rate recommending music to me. But it's okay for automatically generating a radio station, so that I don't have to be involved in selecting every song. With books, I can't listen passively while doing something else. I'm involved in each and every book selection I make. When I'm involved, I'm already better at narrowing down my selection to things I might like than Pandora is.